Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Trouble Code Chart
If a malfunction code is displayed during DTC check, check the circuit corresponding to the code in the table below. Proceed to the page given for the circuit.
HINT:
When "+B or GND short malfunction of communication bus" DTCs (B1214, B1215, etc.) are detected at the same time as "communication stop" DTCs (B1211, B1212, etc.), please repair the "+B or GND short malfunction of communication bus" DTCs first.
| DTC | Description |
|---|---|
| DTC B1200 | BODY ECU COMMUNICATION STOP |
| DTC B1207 | SMART ECU COMMUNICATION STOP |
| DTC B1210 | POWER SOURCE CONTROL ECU COMMUNICATION STOP |
| DTC B1214, B1215 | DOOR SYSTEM COMMUNICATION BUS MALFUNCTION (+B SHORT/GND SHORT) |
| DTC B1248 | AVC-LAN COMMUNICATION IMPOSSIBLE |
| DTC B1260 | TRANSMISSION CONTROL ECU COMMUNICATION STOP |
| DTC B1262 | A/C ECU COMMUNICATION STOP |
| DTC B1271 | COMBINATION METER ECU COMMUNICATION STOP |
| DTC B1294 | IMMOBILIZER ECU COMMUNICATION STOP |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.